- The term gyropsia comes from the Greek words guros (round, circle), and opsis (seeing). It was employed, and possibly introduced, by the French psychiatrist Henri Ey (1900-1977) in 1973 to denote a * metamorphopsia consisting of an illusory circular movement.ReferencesEy, H. (1973). Traité des hallucinations. Tome 1. Paris: Masson et Cie., Éditeurs.
Dictionary of Hallucinations. J.D. Blom. 2010.